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Squamata, Podarcis) Received: 10 March 2020 | Revised: 28 August 2020 | Accepted: 30 August 2020 DOI: 10.1111/zsc.12450 ORIGINAL ARTICLE Multilocus and morphological analysis of south-eastern Iberian Wall lizards (Squamata, Podarcis) Marta Bassitta1 | Joana M. Buades1 | Ana Pérez-Cembranos2 | Valentín Pérez-Mellado2 | Barbara Terrasa1 | Richard P. Brown3 | Pilar Navarro4 | Javier Lluch4 | Jesús Ortega5 | Jose A. Castro1 | Antònia Picornell1 | Cori Ramon1 1Laboratori de Genètica, Departament de Biologia, Universitat de les Illes Balears, Abstract Palma de Mallorca, Spain The phylogenetic relationships among the wall lizards of the Podarcis hispanicus 2Departamento de Biología Animal, complex that inhabit the south-east (SE) of the Iberian Peninsula and other lineages of Universidad de Salamanca, Salamanca, the complex remain unclear. In this study, four mitochondrial and two nuclear mark- Spain 3 ers were used to study genetic relationships within this complex. The phylogenetic School of Biological & Environmental Sciences, Liverpool John Moores analyses based on mtDNA gene trees constructed with ML and BI, and a species tree University, Liverpool, United Kingdom using *BEAST support three divergent clades in this region: the Valencia, Galera 4 Departamento de Zoología, Facultad and Albacete/Murcia lineages. These three lineages were also corroborated in spe- de Ciencias Biológicas, Universitat de València, Valencia, Spain cies delimitation analyses based on mtDNA using bPTP, mPTP, GMYC, ABGD and 5Evolutionary Ecology Unit, Department of BAPS. Bayesian inference species delimitation method (BPP) based on both nuclear Biology, Lund University, Lund, Sweden data and a combined data set (mtDNA + nuclear) showed high posterior probabilities for these three SE lineages (≥0.94) and another Bayesian analysis (STACEY) based Correspondence Marta Bassitta, Laboratori de Genètica, on combined data set recovered the same three groups in this region. Divergence Departament de Biologia, Universitat de les time dating of the species tree provided an estimated divergence of the Galera line- Illes Balears, Crta. de Valldemossa, km 7.5, Podarcis vaucheri 07122, Palma de Mallorca, Illes Balears, age from the other SE group ( , (Albacete/Murcia, Valencia)) at Spain. 12.48 Ma. During this period, the Betic–Rifian arc was isolated, which could have Email: [email protected] caused the isolation of the Galera form distributed to the south of the Betic Corridor. Funding information Although lizards from the Albacete/Murcia and Galera lineage are morphologically European Regional Development similar, they clearly represent distinct genetic lineages. The noteworthy separation Fund; Consellería d'Educació, Cultura i of the Galera lineage enables us to conclude that this lineage must be considered as Universitats (Govern de les Illes Balears), Grant/Award Number: FPI/1772/2015; a new full species. Ministerio de Economía y Competitividad, Grant/Award Number: CGL-2015- KEYWORDS 68139-C2 Iberian Peninsula, mtDNA, nuclear genes, phylogenetics, Podarcis, South-eastern 1 | INTRODUCTION exception of Podarcis muralis (Laurenti, 1768), form a mono- phyletic group (Arnold, Arribas, & Carranza, 2007; Carranza, Morphological and genetic studies spanning the last 25 years Arnold, & Amat, 2004) that is generally referred to as the have attempted to clarify relationships both within and be- Podarcis hispanicus (Steindachner, 1870) species complex. tween lineages of the major lacertid lizard genus Podarcis Currently, seven genetically distinct lineages within this from the Iberian Peninsula and North Africa. These studies complex have been raised to species level: Podarcis gua- reported that all Podarcis that inhabit this region, with the darramae, Podarcis virescens, Podarcis liolepis, Podarcis Zoologica Scripta. 2020;00:1–16. wileyonlinelibrary.com/journal/zsc © 2020 Royal Swedish Academy of Sciences | 1 2 | BASSITTA ET AL. bocagei, Podarcis carbonelli, Podarcis vaucheri and the clustered with those from P. liolepis, in agreement with Pinho nominal taxon P. hispanicus (Caeiro-Dias et al., 2018). The et al. (2006) and unlike the results found by Renoult et al. description of some of these species has been given in differ- (2009) which established that P. liolepis and P. hispanicus ent works, so Harris and Sa-Sousa (2002) found molecular from Galera were two clearly independent groups. The clus- differences between two morphotypes (named types 1 and ter composed by P. liolepis and the Galera lineage was esti- 2) from Western Iberia that were later described as two full mated to have diverged from other members of the species species (Geniez, Sa-Sousa, Guillaume, Cluchier, & Crochet, complex 9.44–13.94 Ma (Kaliontzopoulou et al., 2011). All 2014): Podarcis guadarramae and P. virescens, respectively. these studies trying to establish the phylogeny of Podarcis Moreover, they also divided P. guadarramae into two sub- from the SE (Galera, Valencia and Albacete/Murcia lineages) species: Podarcis guadarramae guadarramae and Podarcis are based on a very low number of individuals for each lin- guadarramae lusitanicus. Harris and Sa-Sousa (2002) also eage. Consequently, the phylogenetic relationships between described a further morphotype (type 3) that was later ele- these groups remain unsolved and require a re-examination vated to species rank as P. liolepis (Renoult, Geniez, Bacquet, based on more extensive information. Guillaume, & Crochet, 2010). Previously, other Iberian For many years, the designation of mitochondrial lineages Podarcis were raised to species level, including P. bocagei within the P. hispanicus complex has been identified solely (Lopez-Seoane, 1885), P. carbonelli (Pérez-Mellado, 1981) by numbers and has coexisted with numerous systematic pro- and P. vaucheri (Busack, Lawson, & Arjo, 2005). posals for these lineages (Geniez et al., 2007, 2014). Despite The nominal taxon within the species complex P. his- the large number of studies carried out on this species com- panicus (Steindachner, 1870) was described as from the plex, the phylogenetic relationships within the complex are south-east (SE) of the Iberian Peninsula (Geniez, Cluchier, not well established and there could be undiscovered inde- Sá-Sousa, Guillaume, & Crochet, 2007). Within this group, pendent lineages. The adequate assignment of potentially Pinho, Ferrand, and Harris (2006) described a new mtDNA new species is a valuable instrument for conservation (Geniez lineage from Galera locality, placed in the Baza Depression et al., 2007, 2014; Renoult et al., 2010). of SE Spain, represented by only a single specimen. This In this paper, we investigate the P. hispanicus complex mtDNA lineage and that of P. liolepis clustered separately with the main aim of establishing the phylogenetic relation- to other members of the species complex. Later work using ships within the SE forms of Podarcis (Valencia, Galera allozyme markers (Pinho, Harris, & Ferrand, 2007) largely and Albacete/Murcia lineage) and between them and other corroborated the existence of a differentiated group in Galera Podarcis from the Iberian Peninsula and North Africa. This area. In these first studies, monophyly of the Galera speci- is achieved through analyses of mtDNA, nuclear DNA and mens with respect to other members of the species complex morphology. These analyses will contribute to knowledge of could not be addressed, due to the inclusion of individuals the evolutionary history and taxonomy of Iberian Podarcis, from a single location. Later genealogies based on two nu- providing deeper biogeographical insights and important in- clear introns (Pinho, Harris, & Ferrand, 2008) did not support formation for conservation bodies. Podarcis from Galera as a monophyletic group and pointed to nuclear gene flow between the Galera and other lineages identified by mtDNA analyses, where they are in sympatry, 2 | MATERIAL AND METHODS at least across parts of their distributions. Renoult, Geniez, Bacquet, Benoit, and Crochet (2009) identified three evolu- 2.1 | Sampling tionary lineages (P. virescens, P. liolepis and P. hispanicus) in the east of Iberian Peninsula from morphological char- In total, 105 Podarcis individuals from the Iberian Peninsula acters and nuclear loci, while their analysis of mtDNA re- and North African region were captured (Table S1 and vealed four lineages (P. virescens, P. liolepis, P. hispanicus Figure 1). Lizards were caught by careful noosing in their from Galera and P. hispanicus from Valencia) suggesting natural habitats with the specific permits delivered by the an ancient introgression. Other studies added to the Galera competent body in each locality. All morphological measure- (Pinho et al., 2006) and Valencia (Renoult et al., 2009) forms, ments were taken in situ, and 1 cm of the tail tip was removed an additional mitochondrial lineage detected in SE Spain and stored in 100% ethanol. All lizards were released at their from the Albacete/Murcia area. The Valencia and Albacete/ capture site. Murcia populations appear to comprise sister mitochondrial Because the distribution of different lineages of P. hispan- lineages, which together represent a sister group to all North icus complex is not well-known in the SE Iberian Peninsula African lineages, from which they diverged 6.99—9.44 Ma (see, for example, Caeiro-Dias et al., 2018 and references (Kaliontzopoulou, Pinho, Harris, & Carretero, 2011). In therein), we sampled some of the localities used by previ- that study, a second individual from the Galera lineage was ous authors,
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